The introduction of CAD/CAM technology to implant dentistry was meant to provide higher quality restorations. Since its introduction, the use of this technology in the production of implant ceramic frameworks and crowns especially in esthetic regions has been rapidly expanding because of the promising esthetic, biologic, and mechanical properties. Alumina as well as Zirconia abutments are characterized by good tissue compatibility (Abrahamsson et al. 1998). In a study by Barclay et al in 1996 it was found that plaque accumulation scores for ceramic-coated transmucosal elements were significantly lower than those recorded in titanium transmucosal elements (Barclay et al. 1996). These results suggest that the further development of a ceramic implant transmucosal collar may assist plaque control at the soft tissue-implant interface and may favorably influence the tissues in this region (Barclay et al. 1996). Other studies documented no significant differences in plaque accumulation and microbial colonization between titanium and ceramic abutment samples (Andersson et al. 2003, Rasperini et al. 1998). The bacterial colonization of Zirconia ceramic surfaces was recently studied in vitro and in vivo (Rimondini et al. 2002). The authors found that, overall, Zirconia ceramic surfaces developed for implant abutments accumulate fewer bacteria than commercially pure titanium, and may therefore be considered as a promising material for abutment manufacturing (Rimondini et al. 2002). A comparison of the recorded superficial soft tissue responses to titanium and ceramic surfaces of transmucosal elements of implants revealed no significant differences between both groups (Barclay et al. 1996, Andersson et al. 2001). Almost no marginal bone loss was recorded, indicating a stable bone situation both at ceramic and titatium abutments on single-tooth implants (Andersson et al. 2001). However, it seems to be that the peri-implant soft tissues adjacent to titanium and ceramic surfaces may differ in features that are not apparent when routine clinical parameters are used (Barclay et al. 1996).